KEYWORDS: Thin films, Second harmonic generation, Phase matching, Frequency conversion, Film thickness, Waveguides, Wave propagation, Standards development, Spectroscopes, Refractive index
We propose an X-cut LiNbO3 non-linear waveguide based on a thin film membrane. The structure allows second harmonic generation by birefringence phase matching between the two fundamental modes TE00 (SHG) and TM00 (Pump) at telecom wavelength. We demonstrate a competitive conversion efficiency compared to a quasi-phase-matched configuration with the advantage of a broadband response of 100nm and high manufacturing tolerance.
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